<?php
/*
 * (21:42:47) malloc_CDLVII: i think that's one of the two rules of Flash Wave Development
 * (21:42:57) malloc_CDLVII: 1. if it is written, it will be rewritten
 * (21:43:04) malloc_CDLVII: 2. it will have automatic updates
 */

header('Content-Type: text/plain; charset=utf-8');

ini_set('display_errors', 'on');
error_reporting(-1);

if($_SERVER['REQUEST_METHOD'] !== 'POST')
    die('no');

$config = __DIR__ . '/../config/git-broadcast.ini';
if(!is_file($config))
    die('config missing');

$config = parse_ini_file($config, true);
if(empty($config['tokens']['token']))
    die('config invalid');

$isGitea = isset($_SERVER['HTTP_X_GITEA_DELIVERY']) && isset($_SERVER['HTTP_X_GITEA_EVENT']);

$rawData = file_get_contents('php://input');
$sigParts = $isGitea
    ? ['sha256', $_SERVER['HTTP_X_GITEA_SIGNATURE']]
    : explode('=', $_SERVER['HTTP_X_HUB_SIGNATURE'] ?? '', 2);

if(empty($sigParts[1]))
    die('invalid signature');

$repoAuthenticated = false;
foreach($config['tokens']['token'] as $repoName => $repoToken) {
    if(hash_equals(hash_hmac($sigParts[0], $rawData, $repoToken), $sigParts[1])) {
        $repoAuthenticated = true;
        break;
    }
}

if(!$repoAuthenticated)
    die('signature check failed');

$data = json_decode($_SERVER['CONTENT_TYPE'] === 'application/x-www-form-urlencoded'
    ? $_POST['payload']
    : $rawData);

if(empty($data))
    die('body is corrupt');

if(empty($data->repository->full_name))
    die('body is corrupt');

if($data->repository->full_name !== $repoName)
    die('invalid repository token');

$message = '';

switch($_SERVER['HTTP_X_GITHUB_EVENT']) {
    case 'ping':
        $message = "ping received from {$data->repository->full_name}!";
        break;

    case 'create':
        switch ($data->ref_type) {
            case 'tag':
                $message = "[b][url={$data->repository->html_url}]{$data->repository->full_name}[/url][/b]: [url={$data->sender->html_url}]{$data->sender->login}[/url] created tag [url={$data->repository->html_url}/releases/tag/{$data->ref}]{$data->ref}[/url]";
                break;

            case 'branch':
                $message = "[b][url={$data->repository->html_url}]{$data->repository->full_name}[/url][/b]: [url={$data->sender->html_url}]{$data->sender->login}[/url] created branch [url={$data->repository->html_url}/tree/{$data->ref}]{$data->ref}[/url]";
                break;

            case 'repository':
                // doubt we'll ever get here
                // TODO: test organisation level webhooks?
                break;
        }
        break;

    case 'delete':
        switch($data->ref_type) {
            case 'tag':
                if (acl_check(ACL_BROADCAST))
                    $message = "[b][url={$data->repository->html_url}]{$data->repository->full_name}[/url][/b]: [url={$data->sender->html_url}]{$data->sender->login}[/url] deleted tag {$data->ref}";
                break;

            case 'branch':
                if (acl_check(ACL_BROADCAST))
                    $message = "[b][url={$data->repository->html_url}]{$data->repository->full_name}[/url][/b]: [url={$data->sender->html_url}]{$data->sender->login}[/url] deleted branch {$data->ref}";
                break;

            case 'repository':
                if (acl_check(ACL_BROADCAST))
                    $message = "[b]{$data->repository->full_name}[/b]: [url={$data->sender->html_url}]{$data->sender->login}[/url] deleted the repository :crying:";
                break;
        }
        break;

    case 'push':
        $commitCount = count($data->commits);
        if($commitCount < 1)
            break;

        $message .= "[b]{$data->repository->full_name}:" . substr($data->ref, strrpos($data->ref, '/') + 1) . "[/b] {$commitCount} new commit" . ($commitCount === 1 ? '' : 's') . "\r\n";

        foreach($data->commits as $commit) {
            $timestamp = strtotime($commit->timestamp);
            $commit->message = trim($commit->message);
            $message .= "[b][url={$commit->url}][code]" . substr($commit->id, 0, 7) . "[/code][/url][/b] {$commit->message} - [url=" . ($isGitea ? 'https://git.flash.moe/' : 'https://github.com/') . "{$commit->author->username}]{$commit->author->username}[/url]\r\n";
        }
        break;

    case 'status':
        $status_colour['failure'] = '#cb2431';
        //$status_colour['pending'] = '#b5ab86';
        $status_colour['success'] = '#28a745';
        $status_colour['error'] = '#586069';
        
        $status_emotes['failure'] = [':angry:', ':angrier:', ':angriest:', ':sad:', ':ouch:', ':dizzy:', ':sweat:', ':fat:', ':jew:'];
        $status_emotes['success'] = [':happy:', ':lol:', ':yay:'];
        $status_emotes['error'] = [':blank:'];
        
        $status_name['continuous-integration/travis-ci/push'] = 'Unit Tests';
        $status_name['continuous-integration/styleci/push'] = 'Style Check';

        if (!array_key_exists($data->context, $status_name) || !array_key_exists($data->state, $status_colour)) {
            //$message = "/msg flash {$data->context}: {$data->state}";
            break;
        }
        
        $message = "[b][url={$data->commit->html_url}]{$data->repository->full_name}[/url] [url={$data->target_url}]" . $status_name[$data->context] . '[/url][/b]: [b][i][color=' . $status_colour[$data->state] . ']' . ucfirst($data->state) . ' ' . $status_emotes[$data->state][array_rand($status_emotes[$data->state])] . '[/color][/i][/b]';
        break;

    case 'watch':
        switch($data->action) {
            case 'started':
                $message = "[url={$data->sender->html_url}]{$data->sender->login}[/url] starred [url={$data->repository->html_url}]{$data->repository->full_name}[/url] :love:";
                break;
        }
        break;

    case 'fork':
        $message = "[url={$data->forkee->html_url}]{$data->forkee->owner->login}[/url] forked [url={$data->repository->html_url}]{$data->repository->full_name}[/url] :omg:";
        break;

    case 'issues':
        if(!in_array($data->action, ['opened', /*'edited',*/ 'closed', 'reopened']))
            break;
        
        $message = "[b][url={$data->repository->html_url}]{$data->repository->full_name}[/url] [url={$data->sender->html_url}]{$data->sender->login}[/url] {$data->action} issue [/b][url={$data->issue->html_url}][b]#{$data->issue->number}[/b]: {$data->issue->title}[/url]";
        break;

    case 'pull_request':
        if(!in_array($data->action, ['opened', /*'edited',*/ 'closed', 'reopened']))
            break;
        
        $message = "[b][url={$data->repository->html_url}]{$data->repository->full_name}[/url]: [url={$data->sender->html_url}]{$data->sender->login}[/url] {$data->action} pull request [/b][url={$data->pull_request->html_url}][b]#{$data->pull_request->number}[/b]: {$data->pull_request->title}[/url]";
        break;
}

if(!empty($message)) {
    var_dump($message);
    $sock = fsockopen($config['boat']['host'], $config['boat']['port'], $errno, $errstr, 5);
    $message = chr(1) . $message;
    $message = hash_hmac('sha256', $message, $config['boat']['secret'], true) . $message;
    fwrite($sock, $message);
}